Apache2でurlopen errorが発生する

Question

Apache/2.4.7(Ubuntu)でflask_script.pyを動作させているのですが，http://163.225.*.*にLAN内の別PCからmypost.pyでPOSTした時にerrorが出てしまいます．下記にエラー．

一応，webサーバにはアクセスできているようで，ubuntuのipアドレスを打てばconvert to imageと正しく表示されます．

またcurlコマンドでpost_testにjsonを送って見てもコマンドラインにjsonのvalueが表示され，正しく動作していると考えられます．

なぜmypost.pyでうまく遅れていないのでしょうか．
apache2で動作させず，同じPCのローカル２端末だとうまく動きます．

#flask_script.py
from flask import Flask
from flask import request
import base64

app = Flask(__name__)

def convert_b64_to_file(b64,outfile_path):
    """
    b64をデコードしてファイルに書き込む
    """
    s = base64.decodestring(b64)
    with open(outfile_path,"wb") as f :
        f.write(s)

@app.route("/")
def index():
    return "convert  to image"

#base64でエンコードされたjsonファイルをデコード
@app.route('/post_request', methods=['POST'])
def post_request():
    #request.jsonでにPOSTされたデータを取ってくる
    temp = request.json["key"]
    #byteに変換
    temp = bytes(temp,"utf-8")
    #デコード
    convert_b64_to_file(temp,"./copy1.png")
    return temp

@app.route('/post_test', methods=['POST'])
def test():
    #request.jsonでにPOSTされたデータを取ってくる
    temp = request.json["key"]
    #byteに変換
    temp = bytes(temp,"utf-8")
    return temp


if __name__ == "__main__":
    app.debug = True
    app.run(host="0.0.0.0")

#mypost.py
import urllib.request, json
import base64

def convert_b64(file_path):
    """
    b64にエンコード
    """
    return base64.encodestring(open(file_path, 'rb').read()).decode("utf-8")

if __name__ == '__main__':
    url = "http://163.225.*.*/post_request"
    image = "test.jpg"
    method = "POST"
    headers = {"Content-Type" : "application/json"}
    value = convert_b64(image)
    # PythonオブジェクトをJSONに変換する
    obj = {"key" : value}
    json_data = json.dumps(obj).encode("utf-8")
    # httpリクエストを準備してPOST
    request = urllib.request.Request(url, data=json_data, method=method, headers=headers)
    with urllib.request.urlopen(request) as response:
        response_body = response.read().decode("utf-8")

Traceback (most recent call last):
  File "/Users/ir/anaconda/lib/python3.6/urllib/request.py", line 1318, in do_open
    encode_chunked=req.has_header('Transfer-encoding'))
  File "/Users/ir/anaconda/lib/python3.6/http/client.py", line 1239, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/Users/ir/anaconda/lib/python3.6/http/client.py", line 1285, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/Users/ir/anaconda/lib/python3.6/http/client.py", line 1234, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/Users/ir/anaconda/lib/python3.6/http/client.py", line 1026, in _send_output
    self.send(msg)
  File "/Users/ir/anaconda/lib/python3.6/http/client.py", line 964, in send
    self.connect()
  File "/Users/ir/anaconda/lib/python3.6/http/client.py", line 936, in connect
    (self.host,self.port), self.timeout, self.source_address)
  File "/Users/ir/anaconda/lib/python3.6/socket.py", line 722, in create_connection
    raise err
  File "/Users/ir/anaconda/lib/python3.6/socket.py", line 713, in create_connection
    sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "mypost.py", line 21, in <module>
    with urllib.request.urlopen(request) as response:
  File "/Users/ir/anaconda/lib/python3.6/urllib/request.py", line 223, in urlopen
    return opener.open(url, data, timeout)
  File "/Users/ir/anaconda/lib/python3.6/urllib/request.py", line 526, in open
    response = self._open(req, data)
  File "/Users/ir/anaconda/lib/python3.6/urllib/request.py", line 544, in _open
    '_open', req)
  File "/Users/ir/anaconda/lib/python3.6/urllib/request.py", line 504, in _call_chain
    result = func(*args)
  File "/Users/ir/anaconda/lib/python3.6/urllib/request.py", line 1346, in http_open
    return self.do_open(http.client.HTTPConnection, req)
  File "/Users/ir/anaconda/lib/python3.6/urllib/request.py", line 1320, in do_open
    raise URLError(err)
urllib.error.URLError: <urlopen error [Errno 61] Connection refused>```

Answer 1

よくわからないのですが，サーバを再起動したら動きました